Home / 28,442.60-42,606.30-19,687.40

Finding the Fourth Proportional to 28,442.60, 42,606.30 and 19,687.40

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Solution

The fourth proportional to 28,442.60, 42,606.30 and 19,687.40 is: 29,491.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.60 : 42,606.30 = 19,687.40 : x
  2. Step 2: Convert to fraction form
    28,442.60/42,606.30 = 19,687.40/x
  3. Step 3: Cross multiply
    28,442.60x = 42,606.30 × 19,687.40
  4. Step 4: Simplify right side
    28,442.60x = 838,807,270.62
  5. Step 5: Solve for x
    x = 838,807,270.62/28,442.60
  6. Step 6: Final answer
    x = 29,491.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.